4397 search results - page 303 / 880 » Relational Algebra Operations |
163
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SAC
1997
ACM
15 years 9 months ago
1997
ACM
Infomaster is an information integration system. It provides integrated access to distributed, heterogeneous information sources, thus giving its users the illusion of a centraliz...
161
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ICSE
1997
IEEE-ACM
15 years 9 months ago
1997
IEEE-ACM
We apply mathematical concept analysis in order to modularize legacy code. By analysing the relation between procedures and global variables, a so-called concept lattice is constr...
117
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VLDB
1997
ACM
15 years 9 months ago
1997
ACM
The result size of a query that involves multiple attributes from the same relation depends on these attributes’ joint data distribution,i.e., the frequencies of all combination...
133
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DEBS
2007
ACM
15 years 8 months ago
2007
ACM
Queries for composite events typically involve the four complementary dimensions of event data, event composition, relationships between events (esp. temporal and causal), and acc...
152
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ICALP
2007
Springer
15 years 8 months ago
2007
Springer
We study the definability of constraint satisfaction problems (CSP) in various fixed-point and infinitary logics. We show that testing the solvability of systems of equations over...